Angel-es



W. Af S. THOMPSON, T. N. KELLETT & R. W. GUNN.

PUMP.

APPLICATION FILED JUNB1,1911.

Patented 0013. 15, 1912.

Ill.

UNITED STATES PATENT OFFICE.

wILL'sIE A. s. THOMPSON, THOMAS N. KELLETT, vAlvi) ROBERT w. GUNN, or Los ANGELES, CALIFORNIA.

PUMP.

Specification of Letters Patent.

Patented Get. 15,1912.

To all whom t may concer-n:

Be it known that we, WrLLsIE A. SCOTT THOMPSON, THOMAS NE1L KELnErr, and ROBERT W. 'GUNN, citizens of the United Statesresiding at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Pump, of which the following is a specification.

This invention relates to the class of plunger pumps and an object of the invention is to provide a pump of this character in which the operation of the foot valve is positive and direct and the Vliability of leakage and of getting out of order is minimized. An object is to provide a pump in which the parts of the foot valve subject to wear will be out of commission when leakage might occur at such point and in which said parts can be constructed of hard material having great capacity Of resisting the wear.

This invention is a pioneer invention in that the pump is provided with a plunger chamber closed at one end and capable of being opened at the other end, first, to receive the charge of liquid to be pumped; and second, to admit a tubular plunger that may be forced into the plunger chamber so as to receive the liquid contained in such chamber; said plunger being provided with a valve to retain the charge while the plunger with the charge is being withdrawn from the plunger chamber, thus creating a vacuum in such chamber to be illed with liquid from the supply source as soon as the port is uncovered by the plunger. That is to say, in this pump the inlet port is at the top'of a chamber that is entirely closed below such port and the plunger constitutes a sliding valve to close the said port through which the liquid enters; and such port is only open at the close of the upward or suction stroke of the plunger.

In this pump the plunger keeps the pump inlet port closed except at the upper limit of the movement of the plunger .and then uncovers the port to allow a charge to flow into such chamber.

The invention may be variously con structed. In some instances an ordinary working barrel may be provided intermediate its ends with a side-port and may be capped at one end thus to form a plunger chamber, and an ordinary tubular valved plunger be then operated past the port into and out of the plunger chamber, thus at suc cessive movements receiving the fluid in the chamber, then withdrawing such duid from the chamber and allowingthe chamber torefill with a new charge of fluid entering .through the portv and then discharging the withdrawn fluid by the displacement caused rby receiving said new charge as the plunger -at present deem most advisable for deep well oil and water pumps. i

The accompanying drawings illustrate the invention in theJ form deemed most desirable.

Figure l is an elevation broken and sectioned in parts to illustrate the construction of this newly-invented pump. The plunger is shown at the beginning of the discharge stroke. Fig. 2 is a fragmental mid-sectional det-ail of the upper end and the -middle portions of the ump with parts in the position shown in Fig. l. Fig. 3 is a fragmental detail showing the pump with the intake port open. In Figs. l and 2 the pumping elements are shown in the relative positions they occupy when the plunger has reached the end Of its downward or charging stroke and is aboutir; return upon its lifting or discharging stroke while in Fig. 3 the relative positions Of parts at the close of the lifting and .discharging stroke is shown.

The case comprises two sections 1, 2 connected 'by the intake coupling 3 and is connected at its outlet end by a shouldered head coupling 4r with vthe pump tubing 5 and is closed at the opposite end by the hollow cap 6. The parts enumerated are screw-threaded together and the couplings and cap are eX- posed and are of the same external diameter as the case, so that the case with its coupling and cap formA a practically smooth cylinder of one diameter from end to end. IThe intake coupling 3 is provided with an intake port which may be in the form of a number of orifices 7 symmetrically or Otherwise arranged around the coupling and the ends of said coupling are externally threaded t-o receive the .case sections and are internally ared to receive the ends of the working barrel sections.

The main working barrel section comprises a hollow cylinder 8, one end of which is fitted inside the cap 6 thus forming the plunger chamber; and the other end of loo which is screw-threaded to receive the retaining ring 9 the upper end of which ringA is externally tapered being reduced upwardly to fit the downwardly flaring end of the intake coupling 3; and said ring 9 has an internally cylindrical chamber 10, a threaded portion 11 and a terminal internal retaining shoulder 12 to form a seat for an anti-wear ring 13 that is retained by said shoulder or seat 12.

The guiding section 14 of the working barrel is tapered at its intake end to form a tight joint with the flaring top seat 15 of the intake coupling and is externally threaded at its upper end to receive an internally threaded retaining ring 16 having an annular inwardly projecting retaining shoulder 17 at its outer end to retain the wear ring 18 that is thereby held against and that is of less diameter than the end of the guiding working barrel section 14 that is secured to the upper end of the inlet coupling 3 by the case section 1 screwed into such coupling, and the shouldered head coupling 4 and the retaining ring 16 between the head-coupling 4 and the working barrel section 14 whereby said working barrel section is forced tightly into the upper end of the ported coupling 3.

The anti-wear rings 13 and 18 are made of hard steel and are of slightly less diameter than the chambers 10 and 19 therefor in the Vretaining rings, so the anti-wear rings may be shifted laterally to a small extent when they are not tightly clamped by the retaining rings 9 and 16 and the working barrel sections 8 and 14.

The working barrel sections may be made of hardened steel. An object in employing the antiwear rings 13 and 18 of the working barrel, is to dispense with the necessity of making the working barrel sections entirely of hardened steel` The shouldered head coupling 4 is provided at its intake end with a cylindrical seat 20 to lit the outside cylindrical retaining ring 16 and is provided with a shoulder having a retaining face 21 to fit against the retaining ring and also having a tapered bore 22 forming a guide shoulder to direct the body 23 of the tubular plunger into the wear ring 18. Said plunger body is a true cylinder from end to end and in length is practically equal to the full length of the working barrel, so that when the plunger is fully inserted into the working barrel the intake end of the plunger will nearly reach to the cap 6 at the lower end of the plunger chamber. Said plunger body is preferably internally threaded at its intake end and is there provided with a hard steel shoe 24 that is of the same external diameter as the plunger body and has a reduced externally-threaded neck 25 screwed into the intake end of the tubular body 23, the outlet end of which is provided with a threaded bushing 26 screwed thereunto and into the valve cage 30 which is provided with the usual valve seat 31 and ball valve 32, and is connected in the usual way with the sucker rod, not shown.

As a matter of preference, where heavy oil is to be pumped, the ball valve 32 is applied at the discharge end of the plunger, but the valve is not arbitrarily located at such discharge end, the purpose of the valve being to close the plunger on the lifting or discharging stroke and to open it on the descending or charging stroke. The threaded portion 33 of the slice at the intake end of the plunger will allow a valve, not shown, to be screwed into the lower end of the plunger as a substitute for the ball valves 31, 32 at the outlet end of the plunger.

The lower end of the cap 6 may be rounded as indicated at 34, so that the pump will readily enter and pass down the casing of the well, not shown.

The coupling 3 is machined at its ends to form the axially alined taper seats 15, 15.

The shouldered head coupling 4 may be provided with an annular seat 35 in which a funnel-shaped cast iron ring 36 may be mounted to serve as a guide for the plunger. The said ring 36 forms a practical part of the shouldered head coupling 4 for the purpose of avoiding injury to the plunger which might occur from forcible contact with the inside of the head coupling 4.

To assemble the pump, the plunger barrel 23 with its shoe 24 and bushing 26, the valve seat 31, valve 32 and cage 30, will be assembled and then the plunger barrel will be inserted into one of the working barrel sections as 8 and the anti-wear ring 13, and then the retaining ring 9 will be brought into place over said ring 13 and will be screwed onto the section 8 and tight against the anti-wear ring 13 to clamp it tightly into the position in which it is held by the plunger barrel; and in this way the antiwear ring is perfectly alined with the working barrel section 8. The plunger is then withdrawn and the same operation of alining is effected in practically the same Inanner with the working barrel section 14, the anti-wear ring 18 and the retaining ring 16.

After the working barrel sections with their anti-wear rings and retaining rings have been solidly fixed together so that the three parts 8, 9 and 13 practically form one solid working barrel section and the parts 14, 16 and 18 practically form another solid working barrel section, said sections are machined so that the upper end of the main section and the lower end of the guiding section will iit into `the flaring seats 15, 15 of the coupling 3. Then the plunger having the shoe 24 and the bushing 26 screwed thereinto will be inserted through the said coupling 4 and into the guiding section 14 of the working barrel. The top section 1 of the case will -be screwed into the coupling and the plunger and guiding working barrel section will then be inserted into the case and coupling. Then the main working barrel section with its retaining ring 9 and antiwear ring 13 will be brought into position in the coupling 3 and the plunger will be pushed on into the main section of the working barrel. Then the lower section 2 of the case to which the cap 6 has been secured will be screwed onto the lower end of the coupling 3, thus forcing the main section of the working barrel into close union with the coupling 3 In practice, now referring to Fig. 1, the plunger will be drawn up thro-ugh the working barrel until the shoe 24 reaches the port holes 7 and thereupon the fluid will rush through the port holes 7 to lill the vacuum. By withdrawing the plunger from the closed plunger chamber, the plunger goes to rest above the open port 7 and is then moved down into the plunger chamber. As it moves down, the fluid contained in said chamber is received into the hollow plunger and on the withdrawal of the plunger from the plunger chamber, the valve will act to retain the fluid in the plunger so that it is withdrawn with the-plunger from the plunger chamber which becomes filled with the fluid as soon as the plunger again opens the port. As the plunger again enters the plun ger chamber, the fluid in said plunger chamber displaces the fluid in the plunger so that when the plunger is fully inserted into the plunger chamber the liquid previously contained in the plunger has been forced through the top of the plunger into the pump tubin 5 and as the plunger is reciprocated t e operation just described is repeated.

The bushing 26 has a collar 37 to engage the downwardly converging walls 22 of the head coupling, thus to hang up the plunger before the hard steel shoe 24 can strike the cap 34.

It is to be noted that the ball valve 32 of the plunger corresponds to the usual ball valve of plunger pumps and that the construction of the parts below said plunger valve is such that leakage could only occur through the port 7 to supply the vacuum formed by the retraction of the plunger 23 and that the moment the lower end of the plunger passes the port 7 said vacuum will be supplied. The foot valve is thus operated positively when the plunger descends closing the ports and any leakage to supply the vacuum on the lifting stroke can only occur past the hard ring 13 which is comparatively not liable to wear.

We claim 1. A pump comprising a plunger chamber having no opening except at the top of said chamber and then being provided with 'a port; and a tubular valved plunger open at its lower end, said lower end working past said port into and out of said chamber, and closing said port while the plunger is in said chamber.

2. The combination with a coupling provided with a port, of a case section connected with one end of said coupling and provided with a cap, a working barrel section movably secured inside the case section above the cap, a guiding working barrel section secured to the other end of the coupling, and a tubular valved plunger working in said working barrel section.

3. A pump comprising a coupling provided with a port, case sections connected by said coupling, working barrel sections in said case sections, means connected with the case sections to retain the working barrel sections in place, one of said working barrel sections being closed at its end opposite the port, and a tubular valved plunger working in said working barrel sect-ions and across said port.

4. A pump comprising a coupling provided with a port, case sections secured to the opposite ends of the coupling, a ,working barrel section in one. of said case sections and seated with relation to the coupling, a cap screwed onto the case section surrounding said working barrel section t-o hold the working barrel section seated, another working barrel section seated in the other end of the coupling, a case sect-ion being secured to such other end of the coupling and surrounding said other working barrel section, an internally-shouldered head coupling screwed into said other case section and into contact with the other working barrel sectio'n to hold it in seated relation to the coupling, and a tubular valved plunger working through said head and in said working barrel sections past said port.

5. In a pump the combination with a plunger chamber closed at one end and provided with a port at the other end, of a tubular valve-d plunger open at its lower end working past t-he port and into and out of said chamber, and an anti-wear ring below the port.

6. In a pump the combination wit-h a coupling having a port and a downwardly flaring bore below the port, of a plunger chamber fitted in the flaring bore, and having an anti-wear ring below the port, and a tubular valved plunger to work past the port and into said chamber.

7. In a pump the combination with a coupling having a port and a downwardly flaring bore below the port, of a plunger chamber fit-ted in the flaring bore, and having an anti-wear ring below the port, a tubular valved plunger to work past the port and into said Chamber and having a shoe on the bottom of the plunger.

8. In apump the combination with a coupling liaving a port and a downwardly fiaring bore below the port, of a plunger charnber fitted in the flaring bore, and having an anti-Wear ring below the port, a tubular valved plunger to Work past the port and into said chamber, a shoe on the bottom of the plunger, a collar on the plunger, and means to support the collar to hang up the plunger to prevent the shoe from ctriking the bottom of the plunger chamber.

In testimony whereof, We have hereunto set our hands at Los Angeles, California, 15 this 26th day of May, 1911.

W. A. S. THOMPSN. THOS. N. KELLETT. ROBERT W. GUNN. In presence of JAMES R. TOWNSEND, L. BELLE RICE.

Copie; of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

